1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <random>
11
12// template <class UIntType, UIntType a, UIntType c, UIntType m>
13//   class linear_congruential_engine;
14
15// void discard(unsigned long long z);
16
17#include <random>
18#include <cassert>
19
20template <class T>
21void
22rand0()
23{
24    typedef std::linear_congruential_engine<T, 16807, 0, 2147483647> E;
25    E e;
26    e.discard(9999);
27    assert(e() == 1043618065);
28}
29
30template <class T>
31void
32rand()
33{
34    typedef std::linear_congruential_engine<T, 48271, 0, 2147483647> E;
35    E e;
36    e.discard(9999);
37    assert(e() == 399268537);
38}
39
40template <class T>
41void
42other()
43{
44    typedef std::linear_congruential_engine<T, 48271, 123465789, 2147483647> E;
45    E e1;
46    E e2;
47    assert(e1 == e2);
48    e1.discard(1);
49    assert(e1 != e2);
50    e2();
51    assert(e1 == e2);
52    e1.discard(3);
53    assert(e1 != e2);
54    e2();
55    e2();
56    e2();
57    assert(e1 == e2);
58}
59
60int main()
61{
62    rand0<unsigned int>();
63    rand0<unsigned long>();
64    rand0<unsigned long long>();
65
66    rand<unsigned int>();
67    rand<unsigned long>();
68    rand<unsigned long long>();
69
70    other<unsigned int>();
71    other<unsigned long>();
72    other<unsigned long long>();
73}
74